Speed control device



M. WEINBERG SPEED CONTROL DEVICE Filed Aug. 25, 1934 eflfarrzls MafiezggI INVENTOR 4 ATTRNEYs atented @et. 6, 1936 UNITED STATES PATENT OFFICESPEED CONTROL DEVICE Application August 25,

1 Claim.

This invention relates to speed control devices for motor vehicles andhas for the primary object the provision of a device of this characterwhich may be readily installed on an engine of a motor vehicle with itsoperating mechanism suitably located at some advantageous place in themotor vehicle, whereby the device may be adjusted and locked so as toprevent the driver or operator of the motor vehicle from driving saidvehicle at a speed greater than the speedselected or set by the device.

With these and other objects in view this invention consists in certainnovel features of construction, combination and arrangement of parts.

to be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had tothe following description and accompanying drawing, in which Figure 1v.is a fragmentary perspective view, partly in section, showing a speedcontrol device applied to a motor vehicle and constructed in accordancewith my invention.

Figure 2 is a fragmentary sectional view showing a part of the operatingmechanism of the control device.

Figure 3 is a sectional view taken on the line 33 of Figure l.

Figure 4 is a sectional view taken on the line i-4 of.Figure 1.

Figure 5 is a sectional view taken on the line 5-5 of Figure 4.

Figure 6 is a fragmentary vertical sectional view showing the speedregulating valve located between the carburetor and the intake manifoldof the engine.

Figure 7 is a sectional view taken on -the line ii of Figure 6.

Referring in detail to the drawing, the numeral il indicates a.fragmentary portion of a, motor vehicle wherein the engine-is indicatedby the character 2 and provided with the usual intake manifold 3 andcarburetor ii. To adapt my invention to a motor vehicle, a fitting 5 isprovided which is placed between the manifold 3 and the carburetor i andthis fitting has a passage 6 therethrough controlled by a valve inormally urged into a closed position by a spring 8. Thestem of thevalve extends into a chamber ii of the fitting and is provided with anarm iii to which the operating mechanism ii is connected. The chamber 9is closed by a plate M which through suitable fasteners i2 may besecured in chamber closing position.

The operating mechanism it consists of a flex- 1934, Serial No. 741,529

ible tube I3 extending from the fitting 5 to a housing It mounted at anysuitable place within the automobile, for instance, to the instrumentboard, as shown in Figure 1. Slidably mounted in the flexible tube I3 isa flexible element I 5, one end of which is pivotally connected to thearm It] and the other end is connected to a bar l6 slidably mounted inthe housing and has connected thereto the shank ll of a, finger pieceI8. The finger piece is arranged exteriorly of the housing It andcarries a pointer l9 operating over a scale plate 20 provided on thehousing. The housing is provided with a slot for the reception of theshank ll of the finger piece and also is equipped with a window 2ipositioned in rear of the pointer I9 for the purpose of permitting lightrays from an electric lamp 22 arranged in the housing to illuminate thepointer and the scale plate. The electric lamp may be furnished withelectricity from any suitable means or connected into the lightingcircuit of the motor vehicle.

, The bar l6 has a series of V-shaped ratchet teeth 23 engaged with theV-shaped teeth of a lock member 24 mounted in a lock casing 25 carriedby the housing I4. The bar "5 has'its teeth' at all times engaged bythose of the lock member 24, but when the latter is in releasedposition, as will presently be described, the bar l6 may ratchet overthe said lock member, when moved longitu-- dinally. A portion of thelock element 24 is in the form of a plunger 26 operating against aspring 21 of the coil type seated in a sleeve-like element 28. Theelement 28 has a limited sliding movement in the lock casing and ridesupon a cam or eccentric 29 forming'part of a lock mechanism 30. Thespring 2? constantly urges the toothed member! into engagement with theteeth of the bar it and thereby holds said bar from free or accidentallongitudinal movement. The spring 2? is sufficiently weak as to permitthe bar it ratcheting over the member 26 when the said bar is actuatedby the finger piece it. When the barrel of the lock 30 is turned by thekey, the cam 2% will be brought to raise the sleeve 28, to cause thespring to force the memher it into tight engagement with the teeth ofthe bar it and incident to the compression thus exerted on the spring tocause the member 2t to lock the bar it thereto. Thus the owner of thevehicle desiring that'the latter not be driven beyond approximateselected speed, the finger piece is adjusted to the speed desired andthe bar is then looked in the adjusted position which places orpositions the valve l so as to admit only such amount of fuel to theengine that will prevent the driving of the vehicle beyond a selectedspeed. Any speeds below the maximum or selected speed of operation ofthe vehicle are controlled through the usual control valve of thecarbureter.

Having described the invention, I claim:

A device of the character set forth comprising a housing having a windowand a slot and a scale denoting miles per hour, said scale being locatedadjacent one side of the window and the slot being located adjacent theopposite side of the window, a shank extending through the slot, 2.combined finger piece and indicator secured to the shank and movableover the Window and relative to the scale, a rack bar guided forlongitudinal movement in the housing and connected to theshank of thefinger piece, means for locking the rack bar from movement comprising aplunger, a toothed member on the plunger which is at all times inengagement with the teeth of the rack bar, a slidable sleeve in whichthe plunger is received, a weak coiled expansion spring inthe sleeveurging the toothed member against the rack bar but permitting theratcheting of the rack bar over said toothed member when the bar ismoved by the finger piece, and a key actuated rotary cam on which thesleeve rests and which sleeve is moved by the cam, when the latteristurned to one position to compress the spring between the sleeve andsaid toothed member to lock said member to the rack bar.

MORRIS WEINBERG.

